- The goal of this clinical research study is to compare 4 chemotherapy treatments for choroid plexus tumors. The safety and level of effectiveness of these study treatments will be compared and studied. The study drugs include different combinations of etoposide, carboplatin, vincristine, cyclophosphamide, methotrexate, doxorubicin, cisplatin, dactinomycin, temozolomide, and irinotecan.